63% (2008)

70% (1996)

66% (2005)

76% (2003)

62% (2000)

77% (2001)

68% (2006)

73% (2002)

68% (2001)

59% (2008)

68% (2002)

56% (2004)

62% (2005)

70% (2003)

54% (2006)

65% (1998)